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Atlas / NTSB / GAA17CA010

NTSB CAROL · Event

Event GAA17CA010

2016-10-06 Boca Reservoir, California, United States None 1 aircraft Status: Completed

Registry · N786AB

FAA Aircraft Registry record.

Make / Model

BACKCOUNTRY SUPER CUBS LLC BACKCOUNTRY SUPERCUB

Year of manufacture

2014 · 2 years old at event

Engine

LYCOMING O-360-J2A (145 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

20151028

ADS-B equipped

Yes — Mode-S AAA6D2

Registrant of record

OHLSON BROCK

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's decision to continue the taxi on unsuitable muddy terrain, which resulted in a nose-over.

Factual narrative

The pilot of the tailwheel equipped airplane with tundra tires, reported that after landing off airport next to a reservoir, the tires became stuck in muddy terrain. He further reported that he decided to "use power and elevator to unstick the tires". The tires loosened from the mud, however, when he applied additional power the airplane nosed over. The airplane sustained substantial damage to its vertical stabilizer and rudder. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. The pilot of the tailwheel equipped airplane with tundra tires, reported that after landing off airport next to a reservoir, the tires became stuck in muddy terrain. He further reported that he decided to "use power and elevator to unstick the tires". The tires loosened from the mud, however, when he applied additional power the airplane nosed over. The airplane sustained substantial damage to its vertical stabilizer and rudder. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot - C
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-Soft surface-Effect on operation
  • Environmental issues-Physical environment-Terrain-Wet/muddy terrain-Effect on operation

Verbatim from NTSB's published report. Source file NTSB_2016_GAA17CA010.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.